registry

[mg911]

is there a way to check the registry to see if the java virtual machine has been installed

 

[tsuji]

Hello, mg911.

There sure is a way(s) to read it out from the registry and with vbs. But, I would start with an easy commandline before the script which reveals also one place where the info is stored in the registry.

[1] Cmdline
Click out Start | Run and enter:
WJview <hard enter>
Or, open the command prompt window and enter:
Jview <hard enter>
You'll see the version displayed.

[2] vbs
The script below does the job as requested.

'---------jvm.vbs--------/tsuji/-----
Option Explicit

Const clsid = &quot;{08B0E5C0-4FCB-11CF-AAA5-00401C608500}&quot;
Const parent = &quot;HKEY_LOCAL_MACHINE\Software\CLASSES\CLSID&quot;
Const child = &quot;InstalledVersion&quot;
Const errmsg = &quot;Microsoft Java VM is not installed in your machine.&quot;

Dim key, wsh, version_number, msg
key = parent & &quot;\&quot; & clsid & &quot;\&quot; & child & &quot;\&quot;
Set wsh = CreateObject(&quot;WScript.Shell&quot
On Error Resume Next
version_number = wsh.RegRead(key)
If Err<>0 Then
msg = errmsg
Else
msg = &quot; The installed Microsoft Java VM is of version : &quot; & version_number
End If
Err.Clear
On Error Goto 0
WScript.Echo msg
set wsh = Nothing
WScript.Quit
'---------jvm.vbs--------/tsuji/-----

regards - tsuji

 

[mg911]

thanks a lot - one more question - is there anyway to point the user to a site or somewhere if they dont have the virtual machine installed on their computer????

Thanks for your help a lot

 

[tsuji]

Hello again.

It usually comes with MSIE. MS also makes it available for download as an independent module : (build 3802)

http://www.microsoft.com/java/vm/dl_vm40.htm

Care to download the right version. MS makes a frightening statement that &quot;Once installed, the Microsoft VM cannot be uninstalled.&quot;

regards - tsuji